CN217870442U - Rotary drilling type steel pipe pile - Google Patents

Abstract

The utility model discloses a steel-pipe pile that anti superficial reinforcement was used, especially a steel-pipe pile of rotary drilling formula, include: the pile comprises a first steel pipe, a second steel pipe and a pile body, wherein one end part of the first steel pipe is provided with a pile tip, the other end part of the first steel pipe is provided with a reaming part, and the outer wall of the first steel pipe is provided with a first helical blade which extends in the axial direction of the first steel pipe; one end of each steel pipe II is a pipe section with a relatively small diameter, the other end of each steel pipe II is provided with a hole expanding part, and the outer pipe wall of each steel pipe II is provided with a spiral blade II and extends in the axial direction of the steel pipe II; the diameters of the first spiral blade and the second spiral blade are linearly reduced in the drilling direction of the steel pipe pile; the lengths of the first steel pipe and the second steel pipe are less than or equal to 1 meter. The utility model provides a "provide a steel-pipe pile" that is applicable to the anti superficial reinforcement of basement and uses technical problem, possess the anti superficial effectual advantage of reinforcement that floats of basement.

Description

Rotary drilling type steel pipe pile

Technical Field

The utility model relates to a steel-pipe pile that anti superficial reinforcement was used, especially a steel-pipe pile of rotatory drilling formula.

Background

The foundation is the greatest importance for building, generally speaking, conventional foundation durability needs to meet the use requirement of building for 70 years, but because of various uncertain factors, such as various adjacent engineering infrastructures, strong geological activities, rapid rise of underground water level and other factors, the original building foundation may be damaged or the design bearing capacity is difficult to meet the pressure bearing or anti-floating requirement of the building. If the anti bearing capacity that floats is difficult to satisfy, the building basement floats to lead to basement ground and wall body fracture infiltration, seriously influence building durability.

After the basement floats, reinforcing measures are needed to increase the anti-floating bearing capacity of the foundation, the basement is prevented from floating continuously, but the height of the common basement is about 2.8m, ventilating ducts and door openings exist in a large number of areas, the actual net height of the basement is only about 2m, the minimum height of a machine frame of the minimum pile foundation construction machine in the current market is 2.5m, and the construction of the whole machine in the basement is difficult to achieve.

At present, the most common anti-floating reinforcing measure is a small static pressure pile, a static pressure pile driver is fixed on a base plate through foundation bolts and provides counterforce, and then a section of static pressure pile is pressed into a stratum through static pressure to form a small pile foundation, so that pulling resistance is provided, and the purpose of reinforcing the basement is achieved. It has the following technical drawbacks:

1. the problem of cracking and water seepage already occurs to the basement bottom plate which needs to be reinforced generally, and the anchor rod static pressure pile needs to provide construction counter pressure by the bottom plate, so that the strength and the integrity of the bottom plate are further influenced;

2. the anchor rod static pressure pile is a soil squeezing pile, and due to the existence of buildings, soil squeezing effect generated by large-scale construction cannot be dissipated from the upper part and only can be diffused to the periphery, so that the original pile foundation is influenced;

3. the uplift resistance is exerted mainly by the side frictional resistance of the pile foundation and the soil layer, the diameter of the pile is small, the side area is small, and the uplift resistance provided by a single pile is relatively small.

Therefore, the utility model is provided.

Disclosure of Invention

The utility model aims at providing a rotary drilling formula's steel-pipe pile in order to solve above-mentioned prior art not enough, it is applicable to the anti reinforcement that floats of basement and uses.

In order to realize above-mentioned purpose, the utility model provides a steel-pipe pile of rotary drilling formula, it includes:

the pile structure comprises a steel pipe I, a pile tip and a pile body, wherein one end part of the steel pipe I is provided with a pile tip, the pile tip and the pile body are in a coaxial structure, the other end part of the steel pipe I is provided with a hole expanding part, a spiral blade I is arranged on the outer pipe wall of the steel pipe I and extends in the axial direction of the steel pipe I, and the diameter of the spiral blade I is linearly reduced in the drilling direction of the steel pipe pile; the length of the first steel pipe is less than or equal to 1 meter;

one end of each steel pipe II is a pipe section with a relatively small diameter, the other end of each steel pipe II is provided with a hole expanding part, the outer pipe wall of each steel pipe II is provided with a spiral blade II, the spiral blade II extends in the axial direction of the steel pipe II, and the diameter of the spiral blade II is linearly reduced in the drilling direction of the steel pipe pile; the length of each steel pipe II is less than or equal to 1 meter;

wherein, in the drilling direction of the steel pipe pile, all the first steel pipes and the second steel pipes are arranged in a line;

the adjacent first steel pipe and the adjacent second steel pipe are inserted into the hole expanding part of the first steel pipe through the pipe sections with relatively small diameters on the second steel pipe and then fixed through bolt fasteners which sequentially penetrate through the pipe wall of the first steel pipe and the pipe wall of the second steel pipe;

and the two adjacent steel pipes II are inserted into the reaming parts of the two preceding steel pipes II through pipe sections with relatively smaller diameters on the following steel pipes II in the drilling direction of the steel pipe pile, and then are fixed through bolt fasteners which sequentially penetrate through the pipe walls of the two steel pipes II.

The middle steel pipe pile is of a sectional structure, the length of each steel pipe of the first steel pipe and the second steel pipe is not more than 1 meter, the steel pipes are driven one by a low-speed hydraulic power head on a construction site, pile sinking is achieved successively in a rotary drilling mode, and the influence of the height limit of a basement is avoided (the actual clear height of the common basement is only about 2 m); moreover, the pile sinking is realized by driving the low-speed hydraulic power head and adopting a rotary drilling mode, the back pressure is not required to be provided by a bottom plate of a basement, the influence on the bottom plate in the construction process is small, and the influence on the soil squeezing effect is small; in addition, the uplift bearing capacity is exerted mainly by the weight of the soil body on the upper part of the helical blade, the stress mechanism is reasonable, and the uplift bearing capacity of the single pile is larger.

Drawings

FIG. 1 is an exploded view of a steel pipe pile;

FIG. 2 is a schematic view of an assembled structure of a steel pipe pile;

fig. 3 is a schematic view of an assembly structure of a second steel pipe pile.

In the figure: the pile comprises a first steel pipe 1, a pile tip 2, a hole expanding part 3, a first helical blade 4, a second steel pipe 5, a pipe section 6, a second helical blade 7 and a bolt fastener 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

As shown in fig. 1, the present embodiment provides a rotary drilling type steel pipe pile as an embodiment of the present invention, including: the drilling tool comprises a steel pipe I1, a pile tip 2 and a drilling part 3, wherein one end part of the steel pipe I1 is provided with a pile tip 2, the two parts are in a coaxial structure, the other end part of the steel pipe I is provided with a reaming part 3, the outer pipe wall of the steel pipe I1 is provided with a helical blade I4, the helical blade I extends in the axial direction of the steel pipe I1, and the diameter of the helical blade I4 is linearly reduced in the drilling direction of the steel pipe pile; the length of the first steel pipe 1 is 1 meter;

one end of the steel pipe II 5 with the reducing structure is a pipe section 6 with a relatively small diameter, the other end of the steel pipe II 5 is provided with a hole expanding part 3, the outer pipe wall of the steel pipe II 5 is provided with a spiral blade II 7, the spiral blade II extends in the axial direction of the steel pipe II 5, and the diameter of the spiral blade II 7 is linearly reduced in the drilling direction of the steel pipe pile; the length of the second steel pipe 5 is 1 meter;

in the embodiment, the steel pipe pile is used for anti-floating reinforcement construction of a basement, and pile sinking is realized by adopting a miniature pile hole drilling machine with a low-speed hydraulic power head. The concrete pile sinking steps are as follows: firstly fixing a lifting support of a micro pile hole drilling machine on a bottom plate, installing a low-speed hydraulic power head on the lifting support and lifting the lifting support to the top, then clamping one end (the end not provided with a pile tip 2) of a first steel pipe 1 by the low-speed hydraulic power head, driving the first steel pipe 1 into the stratum by adopting a rotary drilling mode, synchronously descending the low-speed hydraulic power head on the lifting support at the moment, then disconnecting the low-speed hydraulic power head from the first steel pipe 1 and lifting the first steel pipe to the top of the lifting support again, inserting a pipe section 6 with a relatively smaller diameter on a second steel pipe 5 into a hole expanding part 3 of the first steel pipe 1, then locking and fixing the pipe section by a bolt fastener 8 which sequentially penetrates through the pipe wall of the first steel pipe 1 and the pipe wall of the second steel pipe 5, as shown in figure 2, finally clamping one end of the second steel pipe 5 by the low-speed hydraulic power head, and driving the second steel pipe 5 into the stratum by adopting a rotary drilling mode. To this end, in this embodiment, pile sinking operation of the steel pipe pile is completed, and in the drilling direction of the steel pipe pile, the first steel pipe 1 and the second steel pipe 5 are in a structure in which they are arranged in a row one after another;

of course, according to the anti construction requirement of consolidating that floats of actual basement, the requirement of the bearing capacity value is floated in the opposition promptly, the utility model discloses in a steel-pipe pile, the quantity of two 5 of steel pipe can the adaptability be adjusted in its structure.

For example, as a second embodiment of the present invention, a steel pipe pile provided in the present embodiment includes, as shown in fig. 3, one steel pipe 1 and two steel pipes 5. Wherein, the structure of the first steel pipe 1 and the second steel pipe 5 is completely consistent with that of the previous example.

In the embodiment, the steel pipe pile is used for anti-floating reinforcement construction of a basement, two steel pipes II 5 are arranged in the concrete pile sinking process, so that after one steel pipe II 5 is driven into the bottom layer, a pipe section 6 with a relatively small diameter is inserted into the hole expanding part 3 of the two steel pipe II 5, and then the pipe section is locked and fixed through the bolt fasteners 8 sequentially penetrating through the pipe walls of the two steel pipes II 5, and pile sinking is continuously completed on the two steel pipe II 5 behind through the driving of the low-speed hydraulic power head.

In the same way, as the third embodiment of the present invention, the steel pipe pile provided in this embodiment includes a first steel pipe 1 and a second three steel pipes 5.

In the above embodiments, each part of the steel pipe pile is preferably made of the same steel material, and each part may be welded and fixed in advance on the premise of ensuring the structural strength and hardness of the steel pipe pile, and transported to the site as a precast pile for construction.

In addition, adopt among the above-mentioned miniature stake hole-drilling machine who carries low-speed hydraulic power head, it is as a conventional construction equipment in this trade (this technical field), for example has been known by technical personnel in this field and relevant field, and it realizes the centre gripping the utility model discloses in a steel-pipe pile, only need with the output shaft hole cover of low-speed hydraulic power head to steel pipe 1 or steel pipe two 5 on, mechanical locking can again. The specific structure of the mini-pile hole drilling machine with the low-speed hydraulic power head is not described in detail in the utility model, which does not hinder the specification from making clear and definite descriptions on the claims.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims (1)

1. A rotary drilling type steel pipe pile is characterized by comprising:

the pile structure comprises a first steel pipe and a second steel pipe, wherein one end part of the first steel pipe is provided with a pile tip, the first steel pipe and the second steel pipe are in a coaxial structure, the other end part of the first steel pipe is provided with a reaming part, the outer pipe wall of the first steel pipe is provided with a first helical blade, the first helical blade extends in the axial direction of the first steel pipe, and the diameter of the first helical blade linearly decreases in the drilling direction of the first steel pipe; the length of the first steel pipe is less than or equal to 1 meter;

one end of each steel pipe II is a pipe section with a relatively small diameter, the other end of each steel pipe II is provided with a hole expanding part, the outer pipe wall of each steel pipe II is provided with a spiral blade II, the spiral blade II extends in the axial direction of the steel pipe II, and the diameter of the spiral blade II is linearly reduced in the drilling direction of the steel pipe pile; the length of each second steel pipe is less than or equal to 1 meter;

in the drilling direction of the steel pipe pile, all the steel pipes I and the steel pipes II are arranged in a straight line in sequence;

the adjacent first steel pipe and the adjacent second steel pipe are inserted into the hole expanding part of the first steel pipe through the pipe sections with relatively small diameters on the second steel pipe and then fixed through bolt fasteners which sequentially penetrate through the pipe wall of the first steel pipe and the pipe wall of the second steel pipe;

and the two adjacent steel pipes II are inserted into the reaming parts of the two preceding steel pipes II through pipe sections with relatively smaller diameters on the following steel pipes II in the drilling direction of the steel pipe pile, and then are fixed through bolt fasteners which sequentially penetrate through the pipe walls of the two steel pipes II.

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